ADVERTISEMENT. 



The present List of Described Species of Humming Birds, 

 has been reprinted with some changes from the Classification 

 and Synopsis of the Trochilidse by D. G. Elliot, published in 

 the Smithsonian Contributions to Knowledge. Its object is to 

 facilitate the labelling of the specimens of humming birds in the 

 Museum of the Institution, as also to serve the purposes of a 

 check-list of the species. 



SPENCER F. BAIRD, 



Secretary Smithsonian Inditution. 



Washington, May, 1879. 



(iii) 



